feat: catalog read cache (api + user apps) and clearer Zarrin accounting errors

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/user-app/src/stores/cartStore.ts

@@ -3,7 +3,8 @@
 // localStorage key), just via Pinia's own state instead of @vueuse's
 // useStorage wrapping a hand-rolled class.
 import { defineStore } from 'pinia'
-import { api, type ProductSummary } from '../api/client'
+import type { ProductSummary } from '../api/client'
+import { useCatalogStore } from './catalogStore'
 
 export interface CartItem {
   pid: string
@@ -36,9 +37,9 @@ export const useCartStore = defineStore('cart', {
     // Re-syncs cart entries against fresh product data (e.g. price/weight
     // changes since the item was added), dropping entries whose
     // product/variant no longer exists — same intent as legacy's init().
-    async init() {
+    async init(force = false) {
       try {
-        const products = await api.listProducts()
+        const products = await useCatalogStore().load(force)
         const refreshed: CartItem[] = []
         for (const item of this.items) {
           const product = products.find((p) => p.id === item.pid)